Matthias Baaz Agata Ciabattoni Richard Zach Quantified Propositional Gödel Logics. 240-256 http://link.springer.de/link/service/series/0558/bibs/1955/19550240.htm 2000 conf/lpar/2000 LPAR db/conf/lpar/lpar2000.html#BaazCZ00